exit

SYNOPSIS
       exit [n]

DESCRIPTION
       The  exit  utility  shall  cause the shell to exit with the exit status
       specified by the unsigned decimal integer n.  If n  is  specified,  but
       its  value  is  not  between  0 and 255 inclusively, the exit status is
       undefined.

       A trap on EXIT shall be executed before the  shell  terminates,  except
       when the exit utility is invoked in that trap itself, in which case the
       shell shall exit immediately.

OPTIONS
       None.

OPERANDS
       See the DESCRIPTION.

STDIN
       Not used.

INPUT FILES
       None.

ENVIRONMENT VARIABLES
       None.

ASYNCHRONOUS EVENTS
       Default.

STDOUT
       Not used.

STDERR
       The standard error shall be used only for diagnostic messages.

OUTPUT FILES
       None.

EXTENDED DESCRIPTION
       None.

EXIT STATUS
       The exit status shall be n, if specified. Otherwise, the value shall be
       the  exit value of the last command executed, or zero if no command was
       executed. When exit is executed in a trap action, the last  command  is
       considered  to  be  the command that executed immediately preceding the
       trap action.

CONSEQUENCES OF ERRORS
       Default.



              exit 1

RATIONALE
       As explained in other sections, certain exit status  values  have  been
       reserved  for  special uses and should be used by applications only for
       those purposes:

        126   A file to be executed was found, but it was  not  an  executable
              utility.

        127   A utility to be executed was not found.

       >128   A command was interrupted by a signal.


FUTURE DIRECTIONS
       None.

SEE ALSO
       Special Built-In Utilities

COPYRIGHT
       Portions  of  this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
       Specifications Issue 6, Copyright (C) 2001-2003  by  the  Institute  of
       Electrical  and  Electronics  Engineers, Inc and The Open Group. In the
       event of any discrepancy between this version and the original IEEE and
       The  Open Group Standard, the original IEEE and The Open Group Standard
       is the referee document. The original Standard can be  obtained  online
       at http://www.opengroup.org/unix/online.html .



IEEE/The Open Group                  2003                              EXIT(P)